grass data: symlink to other datasets

[hamish]

in the GRASS sample data for North Carolina in /usr/local/share/grass/nc_spm_08 there are a couple of mapsets such as landsat and sqlite which should be symlinked into the home dir along with PERMANENT.

in future we should do that.

Hamish

[hamish]

added to install_grass.sh in r2440:

ln -s /usr/local/share/grass/nc_spm_08/landsat \
     "$USER_HOME"/grassdata/nc_spm_08/landsat

still need to a bit to the help page saying how to display 3 channel RGB maps and drape the image over one of the hi-res DEMs in NC, or the spot image in spearfish.

• combine eg N.C. LANDSAT bands 5,4,2 (veggies) with r.composite then in nviz use as color map. use elev_srtm_30m as the elevation.

Hamish

[hamish]

ortho drape documented in r3254. didn't bother with making the composite pseudo-color satellite pic first.